Slip-drum hoist



oa. 6,155.25a 1,555,967

* C. C. HANSEN SLIP DRUM HOIST Filed Sept. l0. 1923 f I5v Sheets-Sheet 1 I o'l if?? ,mn-"h VW w, g i I o H 2P o 5 d LLU I B d' n' oct. 6,1925 a 1,555,967

C. C. HANSEN SLIP DRUM HOIST Filed sept. 1o, 1923 s sheets-sheet 2 INVENTOR H15 ATToR EY.

l c.. c. HANSEN y SLIP DRUM Hors'r Filed sept. 1o, 1923 3 sheets-Sheet :s

y INVENTOR Patented Oct. 6, 1925.

UNITED STATE-s- 1,555,967 ,PATENT -OFFICEL CHARLES C. HANSEN, F EASTON, PENNSYLVANIA,'ASSIGNOR TOINGERSOLLA-RAND COMPANY, 0F JERSEYk CITY, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

SLIP-DRUM HOIST.

T0 aZZ whom t may concern Be it known that I, CHARLES C. HANSEN, a citizen of the United States, and a resident of Easton, county of Northampton, and State of Pennsylvania, have invented a certain Slip-Drum Hoist, of which the following is a specification, accompanied by drawings, y

This invention relates to hoists, but` more particularly to a power driven hoist of the double drum type, rin which either drum may be driven' from a common crankshaft.

The objects of the i-nvention are to enable two drums, as for instance, a haulage drum r and a tail rope drum tobe driven from a common source by improved means -and devices which are substantially unaffected by gravity or centrifugal force for automatically disconnecting one drum, and connecting the other drum to the driving shaft in accordance with the direction of rotation of the shaft. v

A further object of the invention is to produce a pawl mechanism for a double drum 'd hoist, which is positively operated and re-r liable in its action.

Further objects of the invention will hereinafter appear, and the invention is shown in one of its preferred forms -in the drawings, in which.-

Figurel is a side elevation of the hoist,

Figure 2 is a longitudinal-sectional elevation on the lline 2 2 of Figure et, looking in the direction of the arrows,

Figure 3 is a transverse sectional elevation on the line ,v3-3 of Figure 2, looking in the direction of the arrows,

Figure 4 is a view similar' to FigureB with the pawls in a different position,

Figure 5 is an enlarged detail perspective view ofthe pawls, and

Figure 6 is an enlarged detail perspective View of one pawl, showing the method of assembly.

Referring to the drawings, the base plate A on which the hoist is mounted, is provided with a clamping member preferably in the form of a saddle clamp B having the clamping bolts C for securing the 'hoist to a column, cross bar or support. Any suitable motor may be provided for the hoist and in this instance, a fluid pressure motor is indicated, having the motor casing mounted on the frame E bolted to the base plate,- as by means of the bolts F, A cylinder head G is secured to the cylinder by the caprbolts H and fluid pressure, as for instance compresse'dair, is supplied through the inlet J controlled by a suitable valve'rK in the valve chest L, and manipulated by the valve lever O. In this instance, the motor is yassumed to be a reversible motor, the reversal of which is controlled by the vvalve lever O. An oiling device P of any suitable type, may be applied to the. motor.

VA center bearing Q shown in this instance in the-form of a shell, having a tubular rbody and a flanged portion'Rl is connected to the motorcylinder D and the cylinder head G by means of the cap bolts H. The opposite end of the center bearing is supported in the gearbox S, which is secured to the frame A, as by the bolts T. A center bearing retaining screw U suitably Asecures the center bearing to the inner wall V of the gear box S. An oiling connection W may be provided upon the gear boX. cover X is secured to the gear boXby means of the bolts Y. Theconstruction of the motor and frame so Vfar described, forms a simple and compact frame for the hoist,

veasily assembled and disassembled and permitting ready accessibility to the operative parts of the hoist.

A main 'driving shaft a passing centrally through the center bearing `Q is supported .in the ball bearings Z) and c and is connected to be rot-ated by the motor. The driving shaft zy-is provided with the crank disc Z having the crank pin e connected to the piston f of the motor by means of the ball bearing g, so that the driving shaft a operates throughout in ball bearings. A driving pinion h is keyed to the driving shaft a and a retaining washer y' is held against the driving pinion b v means of the pin 7c. The driv- D rotates upon the center bearing Q and the concentric tail rope drum m to which the tail rope y is connected, preferably rotates The gear box' upon the haulage drum c, as indicated particularly in Figure 2. Such construction of the drums materially reduces the over-all length of the hoist and produces a more compact and better balanced hoist than heretofore.

Means are provided for automatically connecting the main driver u to one or the other of the drums c and in accordance with the direction of rotation of the driving shaft a, and for this purpose, the haulage drum c is provided with a driver e preferably in the form of a plate having clutch members in the form of teeth 2 on its face, having cam surfaces 3. The driver e is suitably secured to the haulage drum by means of the bolts 4 and for convenience of description, may be termedthe inner driver.

The tail rope drum is likewise provided with a driver 5 opposed to the driver e, and preferably in the form of a plate, having clutch members on its face in the form of teeth 6, facing in the opposite direction from the teeth 2, on the driver e, and having cam surfaces 7. The driver 5 is secured to the tail rope drum m by means of the bolts 8 and for convenience of description, may be termed the outer driver. The terms inner7 and outertas applied to the opposed drivers e and 5 carried by the drums respectively, are not to be vunderstood as necessarily limited to ratchet rings concentric with the aXis of therotation of the machine, but are intended to be used aspsuitable designations for two opposed ratchet faces for the drums, having reference to some iixedvpoint of the machine, which obviously -need not be the driving shaft.

The main driver u is provided with a clutch mechanism. preferably in the form of a pair of separate removable pawls 9 and 10 pivoted on different centers and carried respectively by the sectors 11 and 12, each of which is formed with engaging devices preferably in the form of gear teeth 13 for a portion of its periphery. The sectors 1l and 12 are formed with extensions 14 which are adapted to fit into the recesses 15 in the lugs 16 formed on the main driver u. The pawls 9 and 10 are so constructed and arranged that the pawl 9 may be rocked in one direction into engagement with the inner driver e or the pawl 10 may be rocked in the opposite direction as the pawl 9'into engagement with the outer driver 5, in accord ance with the direction of rotation of the driving shaft a, and when one pawl is rocked into engagement with one driver, the other pawl is simultaneously rocked but in the opposite direction to inoperative position out of engagement with the other driver.

In the operation of the hoist, if it be assumed that the driving shaft a is rotated in the direction of the arrow 17 in Figure 3, the

' main driver u will be rotated by the train of gearing described, in the opposite direction, and the pawl 10 will have been rocked by the pawl 9 riding over one of the cam surfaces 3 on the inner driver e into engagement with one of the teeth 6 of the outer driver 5, thus driving the tail rope drum in the same direction as the main driver, but in the opposite direction to the rotation of the driving shaft a. The arrow 18 in Figure l on the tail rope drum indicates the direction of rotation of the said drum, under such circumstances, when power is appliedto the drum to wind up the tail rope. The haulage drum fu is disconnected from the driving shaft a, which is freely rotated in the same direction as the tail rope drum a", as the rope is un-wound from said haulage drum.

Upon reversing the direction of rotation of the driving' shaft a, as Vindicated in Figure 4, and causing it to rotate inthe direction of the arrow 17a, the direction of rotation of the main driver u will be reversed and the pawl 10 will be actuated by one of the cam surfaces 7 on the outer driver 5 so as to bring the pawl 9 into engagement with one of the teeth 2 on the inner driver e, thus driving the haulage drum c1 in the direction of the arrow 19 in Figure 1, oppositely to the direction of rotation of the driving shaft. In such case, the rope will be wound up on the haulage drumv and the tail rope drum will be rotated freely in the direction of the haulage drum, as the rope is unwound from the tail rope drum. One drum or the other will be automatically -connected to be driven from the driver, as often as the direction of rotation of the driving shaft is reversed.

In a hoist of the character described, a brake is preferably provided for one of the drums, and it is, unnecessary to provide a brake for both drums in accordance with my construction. In this instance, the tail rope drum m may be conveniently provided with a flange 2() to which a brake band 21 having a suitable lining 22, is applied. A. brake lever 23 is connected in any suitable manner to the rod 24 having oppositely threaded portions 25 on which are mounted internally threaded nuts 26 and 27. By actuating the lever 23 in` one direction, the brake band 21, which is connected at its ends to the lugs 28 and 29, carried by the' nuts 26 and 27 respectively, will be tightened about the tail rope drum and controls the rotation of both drums, as long as the drums are connected by the agency of the cable Vand are doing work.

I claim:

1. In a hoist, the combination of a frame, a driving shaft, two drums rotatable about the driving shaft, a motor connected to operate the driving shaft, opposed drivers carried by said drums, and a pair of pawls having engaging devices so connectedA that when one pawl rocks in one direction and automatically connects one drum to the driving shaft, the other paWl is rocked in the Opposite direction and assumes an inoperative position.

2. In a hoist, the combination of a frame, a driving shaft, two drums rotatable relatively to the drivingshaft, a motor connected to operate said driving shaft, a main driver, opposed drivers carried by said drums, and a pair of pawls carried by the main driver and geared together, whereby one pawl automatically connects one drum driver to the main driver, While the other pa-Wl is in inoperative position.

3. In a hoist, the combination of a frame, a driving shaft, tvvo drums rotatable relatively to the driving shaft, a motor connected to operate said driving shaft, a main driver, opposed drivers carried by said drums, and a clutch mechanism for antomatically disconnecting one drum driver and connecting the other drum driver to the main driver in accordance with the direction of rotation of the driving shaft, said mechanism comprising a pair of toothed sectors and pavvls carried by Said sectors.

In testimony whereof I have signed this specification.

CHARLES C. HANSEN. 

